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The development of an ambient pressure MeV SIMS ion beam analysis capability at the Surrey Ion Beam Centre has necessitated the development of a system to protect the vacuum integrity of the main 2 MV tandem particle accelerator. The development and operating characteristics of a fast acting vacuum isolation valve based on the principle of an induction coil are reported and shown to be suitable for...
A novel method of manufacturing iron-based interlayer based on a duplex stainless steel and a melting-point-depressant element (B) was developed. As the B content was enhanced in the range of 0–3.93 wt.%, the melting temperature of the produced alloy decreased. Transient liquid-phase (TLP) bonding of the duplex stainless steel was carried out using a selected filler material with 3.93 wt.% B and the...
Mixed alloy Cu–In–Ga precursors were deposited from Cu–Ga alloy and Indium targets by the DC magnetron co-sputtering method. There were four crystallization phases, In, CuIn 2 , Cu 11 In 9 and Cu 3 Ga, identified in the precursor after deposition. A large grain-size CIGS film was achieved by controlling the annealing period for selenization and utilizing a two-stage...
Behaviours of titanium deuteride targets have been studied experimentally by implantation with 150 kV and 210 kV deuterons extracted from an electrostatic accelerator. Surface morphologies, phase structures and irradiation defects are investigated by scanning electron microscope, X-ray diffraction analysis and slow positron annihilation technology. It is found that surfaces of titanium deuteride targets...
Dielectrical and electrical properties of the blend of poly[2-methoxy,5-(20-ethylhexyloxy)-1,4,-phenylene-vinylene] and fullerene molecules (C60) annealed at different temperatures, with indium tin oxide (ITO) and aluminum contacts. These structures were studied in the dark by means of impedance techniques analysis and current voltage characteristics. Structural evolution of the annealed films was...
Dc breakdown of helium in the range to the left of the Paschen minimum is examined. An expression relating breakdown voltage to the pd product (pressure × inter-electrode distance) and the breakdown temperature of the free electron gas Maxwell spectrum is derived. The type of breakdown mechanism is deduced by submitting the measured values of breakdown voltage in the range to the left of the minimum...
Back reflectors based on Aluminum and Molybdenum as the reflecting materials and ZnO:Al as the transparent conductive oxide, were deposited at low temperature on polyethylene naphthalate by magnetron sputtering. The optimization of the layer thickness of the constituent materials and the final texture of the structure was performed in order to achieve structures with appropriate properties to be applied...
Multi-functional Cu–Al–O thin films were deposited on silicon and quartz substrates by using radio frequency (RF) magnetron sputtering method. The structural characteristics, electrical properties, optical transmittance, in visible and infrared regions, of the films have been investigated. The X-ray diffraction patterns reveal that the as-deposited film is mainly composed of amorphous phase and post-annealing...
Molybdenum thin films are widely used as e.g. diffusion barriers in very large-scale integrated circuits and thin film transistor displays. For better understanding of the evolution of structure and properties, films with different thicknesses have been grown on glass substrates by magnetron sputter deposition. A comprehensive relationship between film thickness, microstructure, stresses and resistivity...
Experimentally observed surface segregation of nickel during Ni:C thin films growth is analyzed by kinetic model. The model is built considering experimental results where microstructure evolution as a function of the substrate temperature and metal content of C:Ni nanocomposite films grown by pulsed filtered cathodic arc deposition is investigated. The kinetic model includes processes of adsorption,...
Graphene oxide (GO)–titania (TiO 2 ) composite was synthesized using a chemical mixing process and its photocatalytic activity for the degradation of a toxic organic vapor (toluene) under different operational conditions was examined. The as-prepared GO–TiO 2 and undoped TiO 2 photocatalysts were characterized using SEM, XRD, and UV–VIS–NIR spectra. Moreover, the photocatalytic...
Energetic Au ion sputtering of crystalline Ge surface at normal incidence and room temperature can produce nanodot morphology, which has been studied by atomic force microscopy. The cross-sectional transmission electron microscopy of the dot structure reveals that the implanted Au does not form solid solution with Ge, but preferentially segregates at the top edges of the dots as well as near the amorphous/crystalline...
The nanocrystalline MgSe thin films were deposited onto glass substrates by spray pyrolysis method at 523 K temperature using MgCl 2 and SeO 2 precursors. Structural, morphological, optical and electrical properties of MgSe thin films have been studied. The structural studies revealed that the as-deposited MgSe thin films are nanocrystalline in nature with cubic lattice. The morphological...
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